A two-stage thermal desorption system for oil sludge with high water content and its integrated skid

Abstract

The invention discloses an oil mud two-stage thermal desorption system with a high water content and integrated skid-mounted equipment, and belongs to the technical field of oil mud treatment devices.The system includes a feeding system, a first-stage thermal desorption system, a second-stage thermal desorption system, a discharge system, a steam condensation and oil-water separation system and anitrogen protection system, which are integrated in the integrated skid-mounted equipment. The system aims at deficiencies of high energy consumption and limited treatment capacity in the oil mud thermal desorption method treatment process, reduces the water content of the oil mud through microwave thermal desorption pretreatment of first-stage thermal radiation, uses the indirect thermal desorption of second-stage heat conduction to separate oil from the soil, and improves the thermal efficiency and the processing capacity of the equipment by a first-stage thermal desorption distributor, a second-stage thermal desorption flame retardant plate and a fire blocking wall to increase the flue gas residence time. The system solves the problem that a microwave belt discharge belt adheres to theoil sludge, a steam releases on the discharge port and the sealing and the safety concern people, the structure is reasonable and compact, and the system is convenient to relocate and install, and has good application prospects.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to an oil sludge disposal device technology, in particular to a two-stage thermal desorption system for oil sludge with high water content and its integrated skid. Background technique [0002] Petroleum is an important energy source and the foundation of the national economy. Petroleum is mainly a complex compound composed of hydrocarbon compounds. Its composition is complex and contains teratogenic, carcinogenic and mutagenic substances (such as halogenated hydrocarbons, benzene series, anilines, phenanthrene, benzopyrene, etc.). As an important environmental basis for the survival of humans, animals, plants and microorganisms, soil is an important place where natural substances and energy participate in the cycle processes of transformation, migration and accumulation. Due to the characteristics of high fluidity, strong permeability, and significant adhesion to ...

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Problems solved by technology

Domestic and foreign oil sludge harmless treatment methods generally include incineration method, biological method, thermal washing method, solvent extraction method, chemical demulsification method, solid-liquid separation method, solidification method, thermal desorption method, thermal cracking method, resource utilization ( Profile control, cement kiln coordination, composting), etc., due to the influence of different sources of oil sludge, differences in the physical and chemical properties of crude oil, and lithology differences in oil sludge, the current processing capacity of resource utilization is small, less than 10% in China, and the rest can make the residue after oil sludge treatment contain oil The main processes with a stable rate of less than 2% are incineration, biological, thermal desorption, pyrolysis, etc., and both incineration and thermal cracking may cause difficulties in tail gas disposal. The biological method is affected by the climate and environment, and it is difficult to comprehensively Promotion, thermal desorption is a modified high-temperature physical treatment method, one of the processes widely used abroad, and widely adopted by western developed countries. According to statistics, by 2006, developed countries such as Europe and the United States have succeeded in more than 300 projects Using this technology, domestic related research began in 2013, and it has become one of the most suitable technologies for oil sludge treatment

[0015] From the above analysis, it can be seen that the single-stage thermal desorption device mainly has problems such as low heat energy utilization rate and small disposal capacity, while the two-stage and above desorption device improves the heat energy utilization of flue gas, but still has the long heating time that restricts the efficiency of the equipment. Disposal capacity, microwave has the characteristics of high efficiency and short time, but if it is used to treat sludge with high water content, it consumes a lot of power and energy consumption

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